.head {
    display: flex;
    justify-content: space-between;
    height: 20px;
    background-color: #333333;
    color: #b0b0b0;
    line-height: 20px;
}

.head a {
    color: #b0b0b0;
}

/* 导航栏部分 */
.nav {
    display: flex;
    justify-content: space-between;
    height: 150px;
    background-color: #ffffff;
}

.nav .nav1 {
    margin-top: 70px;
}
.nav .nav1 li {
    float: left;
    width: 80px;
    height: 30px;
    text-align: center;
    font-size: 18px;
}
.nav .nav1 li:hover {
   color: #ff5f00;
   cursor: pointer;
}
.nav .nav2 {
    margin-top: 60px;
    margin-right: 30px;
}
.nav .nav2 input {
    width: 280px;
    height: 40px;
    float: left;
}
.nav .nav2 button  {
    width: 100px;
    height: 44px;
    float: left;
    color: #ffffff;
    background-color: #ff5f00;
    border: none;
}
/* banner部分 */
.banner {
    display: flex;
}
.banner .banner-left li {
    width: 250px;
    height: 40px;
    color: #ffffff;
    line-height: 40px;
    background-color: #424242;
    padding-left: 50px;
}
.banner .banner-left li:hover {
    background-color: #ff5f00;
}
.banner .banner-left i {
    float: right;
    margin-right: 30px;
}

.banner .banner-right h4 {
    width: 210px;
    color: #ff5f00;
    background-color: #333333;
    padding: 4px;
}
.banner .banner-right ul li  {
    width: 218px;
    height: 37px;
    line-height: 38px;
    background-color: #c0c0c0;
}
.banner .banner-right ul li:hover {
    background-color: #ff5f00;
}
.banner .banner-right ul li i {
    display: inline-block;
    width: 25px;
    height: 20px;
    text-align: center;
    padding-right: 2px;
    line-height: 20px;
    background-color: #ff5f00;
    border-radius: 45%;
}
/* 商品展示栏 */
.show {
    margin-top: 30px;
    overflow: hidden;
}
.show li {
    float: left;
    margin:0 7px;
}
.show li span {
    vertical-align: top;
    font-weight: 700;
    font-size: 14px;
    color: #333333;
}